參數(shù)資料
型號： PIC16LF720-I/ML
廠商： Microchip Technology
文件頁數(shù)： 68/135頁
文件大?。?/td> 0K
描述： MCU PIC 2K FLASH 20-QFN
產(chǎn)品培訓(xùn)模塊： 8-bit PIC® Microcontroller Portfolio
標(biāo)準(zhǔn)包裝： 91
系列： PIC® XLP™ 16F
核心處理器： PIC
芯體尺寸： 8-位
速度： 16MHz
連通性： I²C，SPI，UART/USART
外圍設(shè)備： 欠壓檢測/復(fù)位，POR，PWM，WDT
輸入/輸出數(shù)： 17
程序存儲器容量： 3.5KB（2K x 14）
程序存儲器類型： 閃存
RAM 容量： 128 x 8
電壓 - 電源 (Vcc/Vdd)： 1.8 V ~ 3.6 V
數(shù)據(jù)轉(zhuǎn)換器： A/D 12x8b
振蕩器型： 內(nèi)部
工作溫度： -40°C ~ 85°C
封裝/外殼： 20-VFQFN 裸露焊盤
包裝： 管件
PIC16(L)F720/721
DS41430C-page 38
Preliminary
2010-2011 Microchip Technology Inc.
4.1
Operation
Interrupts are disabled upon any device Reset. They
are enabled by setting the following bits:
GIE bit of the INTCON register
Interrupt Enable bit(s) for the specific interrupt
event(s)
PEIE bit of the INTCON register (if the Interrupt
Enable bit of the interrupt event is contained in the
PIE1 register)
The INTCON and PIR1 registers record individual
interrupts via interrupt flag bits. Interrupt flag bits will be
set, regardless of the status of the GIE, PEIE and
individual Interrupt Enable bits.
The following events happen when an interrupt event
occurs while the GIE bit is set:
Current prefetched instruction is flushed
GIE bit is cleared
Current Program Counter (PC) is pushed onto the
stack
PC is loaded with the interrupt vector 0004h
The ISR determines the source of the interrupt by
polling the interrupt flag bits. The interrupt flag bits must
be cleared before exiting the ISR to avoid repeated
interrupts. Because the GIE bit is cleared, any interrupt
that occurs while executing the ISR will be recorded
through its Interrupt Flag, but will not cause the
processor to redirect to the interrupt vector.
The RETFIE instruction exits the ISR by popping the
previous address from the stack and setting the GIE bit.
For additional information on a specific interrupt’s
operation, refer to its peripheral chapter.
4.2
Interrupt Latency
Interrupt latency is defined as the time from when the
interrupt event occurs to the time code execution at the
interrupt vector begins. The latency for synchronous
interrupts is 3 instruction cycles. For asynchronous
interrupts, the latency is 3 to 4 instruction cycles,
depending on when the interrupt occurs. See Figure 4-2
for timing details.
FIGURE 4-2:
INT PIN INTERRUPT TIMING
Note 1: Individual interrupt flag bits are set,
regardless of the state of any other
enable bits.
2: All interrupts will be ignored while the GIE
bit is cleared. Any interrupt occurring
while the GIE bit is clear will be serviced
when the GIE bit is set again.
Q2
Q1
Q3 Q4
Q2
Q1
Q3 Q4
Q2
Q1
Q3 Q4
Q2
Q1
Q3 Q4
Q2
Q1
Q3 Q4
CLKIN
CLKOUT
INT pin
INTF flag
(INTCON<1>)
GIE bit
(INTCON<7>)
INSTRUCTION FLOW
PC
Instruction
Fetched
Instruction
Executed
Interrupt Latency
PC
PC + 1
0004h
0005h
Inst (0004h)
Inst (0005h)
Dummy Cycle
Inst (PC)
Inst (PC + 1)
Inst (PC – 1)
Inst (0004h)
Dummy Cycle
Inst (PC)
—
Note 1: INTF flag is sampled here (every Q1).
2: Asynchronous interrupt latency = 3-4 TCY. Synchronous latency = 3 TCY, where TCY = instruction cycle time. Latency
is the same whether Inst (PC) is a single cycle or a 2-cycle instruction.
3: CLKOUT is available only in INTOSC and RC Oscillator modes.
4: For minimum width of INT pulse, refer to AC specifications in Section 23.0 “Electrical Specifications”.
5: INTF is enabled to be set any time during the Q4-Q1 cycles.
(1)
(2)
(3)
(4)
(5)
(1)
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PIC16LF720T-I/ML 功能描述:8位微控制器 -MCU 3.5 KB FLASH 128 B SRAM, 18 I/O RoHS:否 制造商:Silicon Labs 核心:8051 處理器系列:C8051F39x 數(shù)據(jù)總線寬度:8 bit 最大時鐘頻率:50 MHz 程序存儲器大小:16 KB 數(shù)據(jù) RAM 大小:1 KB 片上 ADC:Yes 工作電源電壓:1.8 V to 3.6 V 工作溫度范圍:- 40 C to + 105 C 封裝 / 箱體:QFN-20 安裝風(fēng)格:SMD/SMT
PIC16LF720T-I/SO 功能描述:8位微控制器 -MCU 3.5 KB FLASH 128 B SRAM, 18 I/O RoHS:否 制造商:Silicon Labs 核心:8051 處理器系列:C8051F39x 數(shù)據(jù)總線寬度:8 bit 最大時鐘頻率:50 MHz 程序存儲器大小:16 KB 數(shù)據(jù) RAM 大小:1 KB 片上 ADC:Yes 工作電源電壓:1.8 V to 3.6 V 工作溫度范圍:- 40 C to + 105 C 封裝 / 箱體:QFN-20 安裝風(fēng)格:SMD/SMT
PIC16LF720T-I/SS 功能描述:8位微控制器 -MCU 3.5 KB FLASH 128 B SRAM, 18 I/O RoHS:否 制造商:Silicon Labs 核心:8051 處理器系列:C8051F39x 數(shù)據(jù)總線寬度:8 bit 最大時鐘頻率:50 MHz 程序存儲器大小:16 KB 數(shù)據(jù) RAM 大小:1 KB 片上 ADC:Yes 工作電源電壓:1.8 V to 3.6 V 工作溫度范圍:- 40 C to + 105 C 封裝 / 箱體:QFN-20 安裝風(fēng)格:SMD/SMT
PIC16LF721-E/ML 功能描述:8位微控制器 -MCU 7 KB FLASH 256 B SRAM, 18 I/O RoHS:否 制造商:Silicon Labs 核心:8051 處理器系列:C8051F39x 數(shù)據(jù)總線寬度:8 bit 最大時鐘頻率:50 MHz 程序存儲器大小:16 KB 數(shù)據(jù) RAM 大小:1 KB 片上 ADC:Yes 工作電源電壓:1.8 V to 3.6 V 工作溫度范圍:- 40 C to + 105 C 封裝 / 箱體:QFN-20 安裝風(fēng)格:SMD/SMT
PIC16LF721-E/P 功能描述:8位微控制器 -MCU 7 KB FLASH 256 B SRAM, 18 I/O RoHS:否 制造商:Silicon Labs 核心:8051 處理器系列:C8051F39x 數(shù)據(jù)總線寬度:8 bit 最大時鐘頻率:50 MHz 程序存儲器大小:16 KB 數(shù)據(jù) RAM 大小:1 KB 片上 ADC:Yes 工作電源電壓:1.8 V to 3.6 V 工作溫度范圍:- 40 C to + 105 C 封裝 / 箱體:QFN-20 安裝風(fēng)格:SMD/SMT
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